1.A.108.1.1Fibroblast growth factor 2, FGF2, of 288 aas. Forms oligomeric pores in the plasma membrane, and these are involved in its secretion to the external medium where it exerts its action (La Venuta et al. 2016; see family description). The ATP1A1 (TC# 3.A.3.1.1) serves as the receptor for membrane insertion (Zacherl et al. 2015).